JustABeginner wrote:
Got to your osu! skin file and find all the images named "mania-key".
In total there should be six:mania-key1 mania-key1D mania-key2 mania-key2D mania-keyS mania-keySD Along with "@2x" at the back, makes it twelve.
With these, head over to your image editing software and add a blank canvas below each of the mania-keys - this if you want the hitbox to be placed up from its origin.
This would need some trial and errors so it takes time to get what you want.
Example can be seen below - the more spacious the canvas below the hitbox, the higher it will be go from its origin (ignore the black box):
Be sure to rename the images accordingly to its origin and replace them.
And don't forget to refresh the skin afterwards by pressing "Shift", "Ctrl", "Alt" and "S" keys altogether.